for years, lance armstrong cheated, lance armstrong lied. but last night in big public fashion he came clean. in a gripping, surreal interview with oprah, he told oprah point blank he doped to win each of his seven consecutive tour de france titles. he systematically died about doping and ruthlessly attacked his accusers. the 90-minute interview began by cutting to the chase. simple yes or no questions. >> let's start with the questions that people around the world have been waiting for you to answer and for now i'd just like a yes or a no. >> okay. >> okay? this whole conversation, we have a lot of time, will be about the details. yes or no? did you ever take banned substances to enhance your cycling performances? >> yes. >> was one of those banned substances epo? >> yes. >> did you ever blood dope or use blood transfusions to enhance your cycling performance? >> yes. >> did you ever use any other banned substances, like testosterone, cortizone, or human growth hormone? >> yes. >> yes or no. in all seven of your tour de france victories, di